Browsing Faculty of Engineering by Author "Narmanlıoğlu, Ömer"
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Performance analysis and optimization of unipolar OFDM based relay-assisted visible light communications☆☆
Narmanlıoğlu, Ömer; Djengomemgoto, G.; Uysal, Murat (Elsevier, 2017)In this paper, we consider a relay-assisted visible light communication (VLC) system where an intermediate light source cooperates with the main light source. Following the IEEE 802.15.7r1 VLC reference channel model, we ... -
Performance of OFDM-based adaptive visible light communications
Narmanlıoğlu, Ömer; Kızılırmak, R. C.; Uysal, Murat (IEEE, 2017)In this paper, we investigate the performance of a direct current biased optical orthogonal frequency division multiplexing (DCO-OFDM) based adaptive transmission in the context of visible light communication (VLC). We ... -
Pilot-aided channel estimation on SC-PAM based visible light communications
Narmanlıoğlu, Ömer; Turan, B.; Kizilirmak, R. Ç.; Ergen, S. C.; Uysal, Murat (IEEE, 2018-07-02)Estimation of the time-varying optical wireless channel response is crucial in order to decode received signals coherently. In this work, we investigate symbol-error-rate and mean absolute error performance of different ... -
Rate-adaptive OFDM MIMO VLC system
Narmanlıoğlu, Ömer; Kızılırmak, R. Ç.; Miramirkhani, Farshad; Uysal, Murat (IEEE, 2018-01-19)In this paper, we investigate link adaptation for an orthogonal frequency division multiplexing (OFDM)-based multiple-input multiple-output (MIMO) visible light communication (VLC) system. The MIMO system under consideration ... -
Relay-assisted OFDM-based visible light communications
Kızılırmak, R. Ç.; Narmanlıoğlu, Ömer; Uysal, Murat (IEEE, 2015-10)In this study, we investigate a relay-assisted visible light communication (VLC) system where an intermediate light source cooperates with the main light source. Specifically, we consider two light sources in an office ... -
Relay-assisted OFDM-based visible light communications over multipath channels
Narmanlıoğlu, Ömer; Kizilirmak, R. C.; Uysal, Murat (IEEE, 2015-07)In this paper, we investigate the performance of relay-assisted visible light communication (VLC) system over multipath channels. We consider an indoor environment where the ceiling light serves as the information source ... -
SC-FDE based MIMO uplink transmission over infrared communication channels
Narmanlıoğlu, Ömer; Turan, B.; Kızılırmak, R. Ç.; Ergen, S. C.; Uysal, Murat (IEEE, 2018-07-02)In this paper, we propose a multiple-input multiple-output (MIMO) uplink transmission scheme for optical wireless communication applications. The transmission is based on optical single-carrier frequency domain equalization ... -
Visible light channel modeling for gas pipelines
Miramirkhani, Farshad; Uysal, Murat; Narmanlıoğlu, Ömer; Abdallah, M.; Qaraqe, K. (IEEE, 2018-04)In this paper, we explore the use of visible light communication as a means of wireless monitoring in gas pipelines. In an effort to shed light on the communication limits in the presence of gas, we create a three-dimensional ... -
Yazılım tanımlı ağlarda Max-Min Fairness Scheduler başarımı üzerine
Zeydan, E.; Narmanlıoğlu, Ömer (IEEE, 2016)In this paper, we investigate the performance of max-min fairness scheduler in software-defined networks (SDNs) which basically centralizes the controller after separating the control plane from the data plane of network ... -
Yazılım-tanımlı veri depolama ağlarında servis kalite farkındalıklı zamanlamaya doğru
Zeydan, E.; Narmanlıoğlu, Ömer (IEEE, 2017)Yazılım-Tanımlı Veri Depolama (Software-Defined Storage, SDS) konsepti son zamanlarda veri merkezlerinde yeni bir teknoloji olarak ortaya çıkmıştır. Bu teknoloji, hem veri merkezi sahiplerine, hem uygulama geliştiricilerine ...
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